From where do we learn that a ship is not susceptible to tumah-contamination? For it is stated: The way of a ship in the midst of the sea (Proverbs 30:19). From where do we learn that a garden bed, that is six by six handbreadths, may be sown with five types of seeds, four on the four sides of the garden-bed and one in the center? For it is stated: For like the earth, it will give forth its plant, and like a garden, it will cause its seeds to grow (Isaiah 61:11). ‘‘Its seed’’ is not stated, but ‘‘its seeds.’’